The **AD8546ARMZ-R7** is a high-precision, micropower operational amplifier manufactured by Analog Devices. It is specifically designed for battery-powered applications where low current consumption and rail-to-rail performance are critical. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the AD8546ARMZ-R7: | Parameter | Specification | | :--- | :--- | | **Number of Channels** | 2 (Dual Op-Amp) | | **Supply Voltage (Single)** | 1.8 V to 5.5 V | | **Supply Current (per Amp)** | 18 µA (Maximum) | | **Gain Bandwidth Product** | 1.1 MHz | | **Slew Rate** | 0.4 V/µs | | **Input Offset Voltage** | 4 mV (Maximum) | | **Output Type** | Rail-to-Rail Input/Output (RRIO) | | **Package / Case** | 8-MSOP (Mini Small Outline Package) | --- ### 2. Core Functional Features * **Micropower Consumption:** Consuming less than 20 µA per amplifier, it is ideal for "always-on" monitoring circuits and portable medical devices. * **Rail-to-Rail Input/Output:** This allows the signal to swing from the negative rail (ground) to the positive rail (Vcc) without clipping, maximizing the dynamic range in low-voltage systems. * **Low Bias Current:** It features very low input bias current, making it suitable for high-impedance sensor interfaces (like photodiodes or pH probes). * **Unity-Gain Stable:** The amplifier remains stable when configured as a buffer (gain = 1), preventing oscillations in simple voltage follower circuits. --- ### 3. Pin Configuration (8-MSOP) The device follows a standard dual op-amp pinout: | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1 | OUTPUT A | Output of Channel A | | 2 | -INPUT A | Inverting Input of Channel A | | 3 | +INPUT A | Non-inverting Input of Channel A | | 4 | V- | Negative Supply (or Ground) | | 5 | +INPUT B | Non-inverting Input of Channel B | | 6 | -INPUT B | Inverting Input of Channel B | | 7 | OUTPUT B | Output of Channel B | | 8 | V+ | Positive Supply | --- ### 4. Typical Applications 1. **Portable Medical Instrumentation:** ECG monitors, pulse oximeters, and glucose meters. 2. **Remote Sensors:** Wireless sensor nodes where battery replacement is difficult. 3. **Active Filters:** Low-frequency filtering in audio or sensor signal conditioning. 4. **Battery Monitoring:** Sensing voltage and current in power management systems. --- ### 5. Part Number Breakdown: AD8546ARMZ-R7 * **AD8546:** The base model number. * **ARMZ:** Indicates the package type (MSOP) and RoHS compliance (Z). * **R7:** Specifies the tape and reel size (usually 7-inch reel, containing 1,000 units).